/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8                                :vi│
╞══════════════════════════════════════════════════════════════════════════════╡
│ Copyright 2020 Justine Alexandra Roberts Tunney                              │
│                                                                              │
│ Permission to use, copy, modify, and/or distribute this software for         │
│ any purpose with or without fee is hereby granted, provided that the         │
│ above copyright notice and this permission notice appear in all copies.      │
│                                                                              │
│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL                │
│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED                │
│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE             │
│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL         │
│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR        │
│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER               │
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             │
│ PERFORMANCE OF THIS SOFTWARE.                                                │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/math.h"
#include "libc/runtime/gc.h"
#include "libc/testlib/ezbench.h"
#include "libc/testlib/testlib.h"
#include "libc/x/x.h"

#define sinl(x) sinl(VEIL("t", (long double)(x)))
#define sin(x)  sin(VEIL("x", (double)(x)))
#define sinf(x) sinf(VEIL("x", (float)(x)))

void SetUp(void) {
  /* 8087 FPU Control Word
      IM: Invalid Operation ───────────────┐
      DM: Denormal Operand ───────────────┐│
      ZM: Zero Divide ───────────────────┐││
      OM: Overflow ─────────────────────┐│││
      UM: Underflow ───────────────────┐││││
      PM: Precision ──────────────────┐│││││
     PC: Precision Control ────────┐  ││││││
      {float,∅,double,long double} │  ││││││
     RC: Rounding Control ───────┐ │  ││││││
      {even, →-∞, →+∞, →0}       │┌┤  ││││││
                                ┌┤││  ││││││
                               d││││rr││││││*/
  int x87cw = 0b0000000000000000001101100001;
  asm volatile("fldcw\t%0" : /* no outputs */ : "m"(x87cw));
}

TEST(sinl, test) {
  EXPECT_STREQ("NAN", gc(xdtoal(sinl(NAN))));
  EXPECT_STREQ("-NAN", gc(xdtoal(sinl(+INFINITY))));
  EXPECT_STREQ("-NAN", gc(xdtoal(sinl(-INFINITY))));
  EXPECT_STREQ(".479425538604203", gc(xdtoal(sinl(.5))));
  EXPECT_STREQ("-.479425538604203", gc(xdtoal(sinl(-.5))));
  EXPECT_STREQ(".8414709794048734", gc(xdtoal(sinl(.99999999))));
  /* EXPECT_STREQ("-.998836772397", gc(xdtoal(sinl(555555555555)))); */
  /* EXPECT_STREQ("1", gc(xdtoal(SINL(5.319372648326541e+255L)))); */
}

TEST(sin, test) {
  EXPECT_TRUE(isnan(sin(NAN)));
  EXPECT_TRUE(isnan(sin(+INFINITY)));
  EXPECT_TRUE(isnan(sin(-INFINITY)));
  EXPECT_STREQ("NAN", gc(xdtoa(sin(NAN))));
  EXPECT_STREQ(".479425538604203", gc(xdtoa(sin(.5))));
  EXPECT_STREQ("-.479425538604203", gc(xdtoa(sin(-.5))));
  EXPECT_STREQ(".479425538604203", gc(xdtoa(sin(.5))));
  EXPECT_STREQ("-.479425538604203", gc(xdtoa(sin(-.5))));
}

TEST(sinf, test) {
  EXPECT_TRUE(isnan(sinf(NAN)));
  EXPECT_TRUE(isnan(sinf(+INFINITY)));
  EXPECT_TRUE(isnan(sinf(-INFINITY)));
  EXPECT_STREQ("NAN", gc(xdtoaf(sinf(NAN))));
  EXPECT_STARTSWITH(".479426", gc(xdtoaf(sinf(.5f))));
  EXPECT_STARTSWITH("-.479426", gc(xdtoaf(sinf(-.5f))));
  EXPECT_STARTSWITH(".873283", gc(xdtoaf(sinf(555))));
}

BENCH(sinl, bench) {
  EZBENCH(donothing, sinl(0.7));  /* ~30ns */
  EZBENCH(donothing, sin(0.7));   /* ~35ns */
  EZBENCH(donothing, sinf(0.7f)); /* ~35ns */
}
